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<h1 class="title">addressbook.cpp 示例文件</h1>
<span class="subtitle">tutorials/addressbook/part3/addressbook.cpp</span>
<!-- $$$tutorials/addressbook/part3/addressbook.cpp-description -->
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<pre class="cpp">

  <span class="comment">/****************************************************************************
  **
  ** Copyright (C) 2016 The Qt Company Ltd.
  ** Contact: https://www.qt.io/licensing/
  **
  ** This file is part of the examples of the Qt Toolkit.
  **
  ** $QT_BEGIN_LICENSE:BSD$
  ** Commercial License Usage
  ** Licensees holding valid commercial Qt licenses may use this file in
  ** accordance with the commercial license agreement provided with the
  ** Software or, alternatively, in accordance with the terms contained in
  ** a written agreement between you and The Qt Company. For licensing terms
  ** and conditions see https://www.qt.io/terms-conditions. For further
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  **
  ** &quot;Redistribution and use in source and binary forms, with or without
  ** modification, are permitted provided that the following conditions are
  ** met:
  **   * Redistributions of source code must retain the above copyright
  **     notice, this list of conditions and the following disclaimer.
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  <span class="preprocessor">#include &lt;QtWidgets&gt;</span>
  <span class="preprocessor">#include &quot;addressbook.h&quot;</span>

  AddressBook<span class="operator">::</span>AddressBook(<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent)
      : <span class="type"><a href="qwidget.html">QWidget</a></span>(parent)
  {
      <span class="type"><a href="qlabel.html">QLabel</a></span> <span class="operator">*</span>nameLabel <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlabel.html">QLabel</a></span>(tr(<span class="string">&quot;Name:&quot;</span>));
      nameLine <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlineedit.html">QLineEdit</a></span>;
      nameLine<span class="operator">-</span><span class="operator">&gt;</span>setReadOnly(<span class="keyword">true</span>);

      <span class="type"><a href="qlabel.html">QLabel</a></span> <span class="operator">*</span>addressLabel <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlabel.html">QLabel</a></span>(tr(<span class="string">&quot;Address:&quot;</span>));
      addressText <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qtextedit.html">QTextEdit</a></span>;
      addressText<span class="operator">-</span><span class="operator">&gt;</span>setReadOnly(<span class="keyword">true</span>);

      addButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpushbutton.html">QPushButton</a></span>(tr(<span class="string">&quot;&amp;Add&quot;</span>));
      addButton<span class="operator">-</span><span class="operator">&gt;</span>show();
      submitButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpushbutton.html">QPushButton</a></span>(tr(<span class="string">&quot;&amp;Submit&quot;</span>));
      submitButton<span class="operator">-</span><span class="operator">&gt;</span>hide();
      cancelButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpushbutton.html">QPushButton</a></span>(tr(<span class="string">&quot;&amp;Cancel&quot;</span>));
      cancelButton<span class="operator">-</span><span class="operator">&gt;</span>hide();
      nextButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpushbutton.html">QPushButton</a></span>(tr(<span class="string">&quot;&amp;Next&quot;</span>));
      nextButton<span class="operator">-</span><span class="operator">&gt;</span>setEnabled(<span class="keyword">false</span>);
      previousButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpushbutton.html">QPushButton</a></span>(tr(<span class="string">&quot;&amp;Previous&quot;</span>));
      previousButton<span class="operator">-</span><span class="operator">&gt;</span>setEnabled(<span class="keyword">false</span>);

      connect(addButton<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(addContact()));
      connect(submitButton<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(submitContact()));
      connect(cancelButton<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(cancel()));
      connect(nextButton<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(next()));
      connect(previousButton<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(previous()));

      <span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span> <span class="operator">*</span>buttonLayout1 <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span>;
      buttonLayout1<span class="operator">-</span><span class="operator">&gt;</span>addWidget(addButton<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AlignTop);
      buttonLayout1<span class="operator">-</span><span class="operator">&gt;</span>addWidget(submitButton);
      buttonLayout1<span class="operator">-</span><span class="operator">&gt;</span>addWidget(cancelButton);
      buttonLayout1<span class="operator">-</span><span class="operator">&gt;</span>addStretch();
      <span class="type"><a href="qhboxlayout.html">QHBoxLayout</a></span> <span class="operator">*</span>buttonLayout2 <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qhboxlayout.html">QHBoxLayout</a></span>;
      buttonLayout2<span class="operator">-</span><span class="operator">&gt;</span>addWidget(previousButton);
      buttonLayout2<span class="operator">-</span><span class="operator">&gt;</span>addWidget(nextButton);
      <span class="type"><a href="qgridlayout.html">QGridLayout</a></span> <span class="operator">*</span>mainLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qgridlayout.html">QGridLayout</a></span>;
      mainLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(nameLabel<span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">0</span>);
      mainLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(nameLine<span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">1</span>);
      mainLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(addressLabel<span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AlignTop);
      mainLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(addressText<span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">1</span>);
      mainLayout<span class="operator">-</span><span class="operator">&gt;</span>addLayout(buttonLayout1<span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">2</span>);
      mainLayout<span class="operator">-</span><span class="operator">&gt;</span>addLayout(buttonLayout2<span class="operator">,</span> <span class="number">2</span><span class="operator">,</span> <span class="number">1</span>);
      setLayout(mainLayout);
      setWindowTitle(tr(<span class="string">&quot;Simple Address Book&quot;</span>));
  }

  <span class="type">void</span> AddressBook<span class="operator">::</span>addContact()
  {
      oldName <span class="operator">=</span> nameLine<span class="operator">-</span><span class="operator">&gt;</span>text();
      oldAddress <span class="operator">=</span> addressText<span class="operator">-</span><span class="operator">&gt;</span>toPlainText();

      nameLine<span class="operator">-</span><span class="operator">&gt;</span>clear();
      addressText<span class="operator">-</span><span class="operator">&gt;</span>clear();

      nameLine<span class="operator">-</span><span class="operator">&gt;</span>setReadOnly(<span class="keyword">false</span>);
      nameLine<span class="operator">-</span><span class="operator">&gt;</span>setFocus(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>OtherFocusReason);
      addressText<span class="operator">-</span><span class="operator">&gt;</span>setReadOnly(<span class="keyword">false</span>);

      addButton<span class="operator">-</span><span class="operator">&gt;</span>setEnabled(<span class="keyword">false</span>);
      nextButton<span class="operator">-</span><span class="operator">&gt;</span>setEnabled(<span class="keyword">false</span>);
      previousButton<span class="operator">-</span><span class="operator">&gt;</span>setEnabled(<span class="keyword">false</span>);
      submitButton<span class="operator">-</span><span class="operator">&gt;</span>show();
      cancelButton<span class="operator">-</span><span class="operator">&gt;</span>show();
  }

  <span class="type">void</span> AddressBook<span class="operator">::</span>submitContact()
  {
      <span class="type"><a href="../qtcore/qstring.html">QString</a></span> name <span class="operator">=</span> nameLine<span class="operator">-</span><span class="operator">&gt;</span>text();
      <span class="type"><a href="../qtcore/qstring.html">QString</a></span> address <span class="operator">=</span> addressText<span class="operator">-</span><span class="operator">&gt;</span>toPlainText();

      <span class="keyword">if</span> (name<span class="operator">.</span>isEmpty() <span class="operator">|</span><span class="operator">|</span> address<span class="operator">.</span>isEmpty()) {
          <span class="type"><a href="qmessagebox.html">QMessageBox</a></span><span class="operator">::</span>information(<span class="keyword">this</span><span class="operator">,</span> tr(<span class="string">&quot;Empty Field&quot;</span>)<span class="operator">,</span>
              tr(<span class="string">&quot;Please enter a name and address.&quot;</span>));
          <span class="keyword">return</span>;
      }

      <span class="keyword">if</span> (<span class="operator">!</span>contacts<span class="operator">.</span>contains(name)) {
          contacts<span class="operator">.</span>insert(name<span class="operator">,</span> address);
          <span class="type"><a href="qmessagebox.html">QMessageBox</a></span><span class="operator">::</span>information(<span class="keyword">this</span><span class="operator">,</span> tr(<span class="string">&quot;Add Successful&quot;</span>)<span class="operator">,</span>
              tr(<span class="string">&quot;\&quot;%1\&quot; has been added to your address book.&quot;</span>)<span class="operator">.</span>arg(name));
      } <span class="keyword">else</span> {
          <span class="type"><a href="qmessagebox.html">QMessageBox</a></span><span class="operator">::</span>information(<span class="keyword">this</span><span class="operator">,</span> tr(<span class="string">&quot;Add Unsuccessful&quot;</span>)<span class="operator">,</span>
              tr(<span class="string">&quot;Sorry, \&quot;%1\&quot; is already in your address book.&quot;</span>)<span class="operator">.</span>arg(name));
      }

      <span class="keyword">if</span> (contacts<span class="operator">.</span>isEmpty()) {
          nameLine<span class="operator">-</span><span class="operator">&gt;</span>clear();
          addressText<span class="operator">-</span><span class="operator">&gt;</span>clear();
      }

      nameLine<span class="operator">-</span><span class="operator">&gt;</span>setReadOnly(<span class="keyword">true</span>);
      addressText<span class="operator">-</span><span class="operator">&gt;</span>setReadOnly(<span class="keyword">true</span>);
      addButton<span class="operator">-</span><span class="operator">&gt;</span>setEnabled(<span class="keyword">true</span>);

      <span class="type">int</span> number <span class="operator">=</span> contacts<span class="operator">.</span>size();
      nextButton<span class="operator">-</span><span class="operator">&gt;</span>setEnabled(number <span class="operator">&gt;</span> <span class="number">1</span>);
      previousButton<span class="operator">-</span><span class="operator">&gt;</span>setEnabled(number <span class="operator">&gt;</span> <span class="number">1</span>);
      submitButton<span class="operator">-</span><span class="operator">&gt;</span>hide();
      cancelButton<span class="operator">-</span><span class="operator">&gt;</span>hide();
  }

  <span class="type">void</span> AddressBook<span class="operator">::</span>cancel()
  {
      nameLine<span class="operator">-</span><span class="operator">&gt;</span>setText(oldName);
      addressText<span class="operator">-</span><span class="operator">&gt;</span>setText(oldAddress);

      <span class="keyword">if</span> (contacts<span class="operator">.</span>isEmpty()) {
          nameLine<span class="operator">-</span><span class="operator">&gt;</span>clear();
          addressText<span class="operator">-</span><span class="operator">&gt;</span>clear();
      }

      nameLine<span class="operator">-</span><span class="operator">&gt;</span>setReadOnly(<span class="keyword">true</span>);
      addressText<span class="operator">-</span><span class="operator">&gt;</span>setReadOnly(<span class="keyword">true</span>);
      addButton<span class="operator">-</span><span class="operator">&gt;</span>setEnabled(<span class="keyword">true</span>);

      <span class="type">int</span> number <span class="operator">=</span> contacts<span class="operator">.</span>size();
      nextButton<span class="operator">-</span><span class="operator">&gt;</span>setEnabled(number <span class="operator">&gt;</span> <span class="number">1</span>);
      previousButton<span class="operator">-</span><span class="operator">&gt;</span>setEnabled(number <span class="operator">&gt;</span> <span class="number">1</span>);

      submitButton<span class="operator">-</span><span class="operator">&gt;</span>hide();
      cancelButton<span class="operator">-</span><span class="operator">&gt;</span>hide();
  }

  <span class="type">void</span> AddressBook<span class="operator">::</span>next()
  {
      <span class="type"><a href="../qtcore/qstring.html">QString</a></span> name <span class="operator">=</span> nameLine<span class="operator">-</span><span class="operator">&gt;</span>text();
      <span class="type"><a href="../qtcore/qmap.html">QMap</a></span><span class="operator">&lt;</span><span class="type"><a href="../qtcore/qstring.html">QString</a></span><span class="operator">,</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span><span class="operator">&gt;</span><span class="operator">::</span>iterator i <span class="operator">=</span> contacts<span class="operator">.</span>find(name);

      <span class="keyword">if</span> (i <span class="operator">!</span><span class="operator">=</span> contacts<span class="operator">.</span>end())
          i<span class="operator">+</span><span class="operator">+</span>;

      <span class="keyword">if</span> (i <span class="operator">=</span><span class="operator">=</span> contacts<span class="operator">.</span>end())
          i <span class="operator">=</span> contacts<span class="operator">.</span>begin();

      nameLine<span class="operator">-</span><span class="operator">&gt;</span>setText(i<span class="operator">.</span>key());
      addressText<span class="operator">-</span><span class="operator">&gt;</span>setText(i<span class="operator">.</span>value());
  }
  <span class="type">void</span> AddressBook<span class="operator">::</span>previous()
  {
      <span class="type"><a href="../qtcore/qstring.html">QString</a></span> name <span class="operator">=</span> nameLine<span class="operator">-</span><span class="operator">&gt;</span>text();
      <span class="type"><a href="../qtcore/qmap.html">QMap</a></span><span class="operator">&lt;</span><span class="type"><a href="../qtcore/qstring.html">QString</a></span><span class="operator">,</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span><span class="operator">&gt;</span><span class="operator">::</span>iterator i <span class="operator">=</span> contacts<span class="operator">.</span>find(name);

      <span class="keyword">if</span> (i <span class="operator">=</span><span class="operator">=</span> contacts<span class="operator">.</span>end()){
          nameLine<span class="operator">-</span><span class="operator">&gt;</span>clear();
          addressText<span class="operator">-</span><span class="operator">&gt;</span>clear();
          <span class="keyword">return</span>;
      }

      <span class="keyword">if</span> (i <span class="operator">=</span><span class="operator">=</span> contacts<span class="operator">.</span>begin())
          i <span class="operator">=</span> contacts<span class="operator">.</span>end();

      i<span class="operator">-</span><span class="operator">-</span>;
      nameLine<span class="operator">-</span><span class="operator">&gt;</span>setText(i<span class="operator">.</span>key());
      addressText<span class="operator">-</span><span class="operator">&gt;</span>setText(i<span class="operator">.</span>value());
  }

</pre>
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<!-- @@@tutorials/addressbook/part3/addressbook.cpp -->
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